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Proceedings Paper

Spin-polarizes transport through doped nanotube junctions in presence of applied magnetic field
Author(s): Amir Abbas Farajian; Hiroshi Mizuseki; Yoshiyuki Kawazoe
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Paper Abstract

The effects of different spin orientations on transport through carbon nanotubes are studied, using a simple tight-binding model within the mean-field approximation. It turns out that, in the absence of external magnetic field, the mean-field ground states of both semiconducting and metallic nanotubes are antiferromagnetic. As regards electronic/transport properties, it is observed that the conductance characteristics of spin-up and spin-down carriers are separated, and a negative differential resistance (NDR) feature in the I-V characteristics is detected, when the system is subjected to external magnetic field. NDR is particularly interesting for a wide range of applications.

Paper Details

Date Published: 11 June 2003
PDF: 3 pages
Proc. SPIE 5023, 10th International Symposium on Nanostructures: Physics and Technology, (11 June 2003); doi: 10.1117/12.514540
Show Author Affiliations
Amir Abbas Farajian, Tohoku Univ. (Japan)
Hiroshi Mizuseki, Tohoku Univ. (Japan)
Yoshiyuki Kawazoe, Tohoku Univ. (Japan)

Published in SPIE Proceedings Vol. 5023:
10th International Symposium on Nanostructures: Physics and Technology
Zhores I. Alferov; Leo Esaki, Editor(s)

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